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SUMMARY:Spray in Crossflow - Dr. Anubhav Sinha\, University of Warwick
DTSTART:20180427T120000Z
DTEND:20180427T130000Z
UID:TALK105085@talks.cam.ac.uk
CONTACT:Charlotte Coles
DESCRIPTION:My research focuses on the investigation of fuel injection in 
 crossflow\, having potential application in gas turbine combustors. The fi
 rst part of this study deals with liquid jet in crossflow. The effect of n
 ozzle geometry on jet breakup and trajectory are investigated. Surface wav
 es on liquid jets are observed and a theoretical framework is developed to
  predict the wavelength of these waves. Airblast spray in crossflow is the
 n studied and its structure\, trajectory\, droplet size distribution and d
 roplet velocities are characterized for various operating parameters. Diff
 erent spray regimes are observed and a regime map is proposed. Spray from 
 Jet-A1 and its surrogate fuels are studied in preheated cross flow. Evapor
 ation of droplets is studied and evaporation constants are calculated. The
  last part of the study is concerned with numerical simulation of the abov
 e mentioned experimental studies. Assuming droplets to be perfect spheres 
 at injection is a very common assumption in spray simulations. Near-nozzle
  images captured in this study show highly distorted droplets/ ligaments w
 hich limits the applicability of spherical droplet assumption. Modificatio
 n in the droplet break-up model is proposed to account for the initial dro
 plet distortion.\nFinally\, I will talk about the ongoing research on hydr
 ogen explosions in vented enclosures. A new phenomenological model\, based
  on spherical flame propagation is developed which is found to be in good 
 agreement with the experimental data.\n
LOCATION:JDB Seminar Room\, CUED
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